#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <fcntl.h>
 #include <limits.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #define FIFO_NAME "/tmp/myfifo"
 #define BUFFER_SIZE PIPE_BUF
int main()
{
int pipe_fd;
int res;
int open_mode = O_RDONLY;
char buffer[BUFFER_SIZE + 1];
int bytes = 0;
memset(buffer, 0, sizeof(buffer));
printf("Process %d opeining FIFO O_RDONLY \n", getpid());
pipe_fd = open(FIFO_NAME, open_mode);
printf("Process %d result %d\n", getpid(), pipe_fd);
if (pipe_fd != -1) {
    do {
        res = read(pipe_fd, buffer, BUFFER_SIZE);
        bytes += res;
    } while (res > 0);
    close(pipe_fd);
} else {
    exit(EXIT_FAILURE);
}
   printf("Process %d finished, %d bytes read\n", getpid(), bytes);
exit(EXIT_SUCCESS);
}
